Eucalyptus oil has a strong scent that seems to have some success in repelling roaches. You can dilute it with water and spray areas you think cockroaches might have nested.
Eucalyptus essential oil has a fresh fragrance that, surprisingly, seems to confuse or alarm cockroaches. This stuff is strong and you'll only need to mix a few drops with water and spray it around the cockroaches' hotspots to repel them. Research has also shown that eucalyptus essential oil is toxic to roaches.
Eucalyptus. Koala bears may love the smell, and the taste of eucalyptus, but cockroaches find it quite disagreeable. If you have been looking for an excuse to plant a eucalyptus bush in your front yard or spray your home with fresh eucalyptus oil, consider this your opening.
Roach Repellents
Peppermint oil, cedarwood oil, and cypress oil are essential oils that effectively keep cockroaches at bay. Additionally, these insects hate the smell of crushed bay leaves and steer clear of coffee grounds. If you want to try a natural way to kill them, combine powdered sugar and boric acid.
While lavender oil is a natural repellent against insects, including flies and fleas, it is not usually effective against roaches. Citrus oil, peppermint oil and bay leaves repel roaches naturally. You can combine lavender oil with them to create an all-around insect repellent for your home.
For kitchen deterrents, cockroaches dislike the smell of cinnamon, bay leaves, garlic, peppermint, and coffee grounds. If you want a strong-smelling disinfectant, choose vinegar or bleach. The best scent-based deterrents are essential oils, such as eucalyptus or tea tree oil.
Research has found that some essential oils—especially rosemary oil—are effective at repelling roaches. Rosemary oil was found to offer a 100% roach mortality rate at the concentration range of 2.5% to 30%. So mix it with water and spray away at your problem areas!
Repel bugs
Spiders hate eucalyptus, so using a eucalyptus spray or hanging the plant themselves throughout your home can do wonders for repelling the eight-legged creatures. But eucalyptus doesn't just deter spiders; fleas, other bugs, and pests typically don't like eucalyptus either and tend to stay away.
OLE, which is an extract of the lemon eucalyptus tree, is predominantly used to repel pests. These can include mosquitoes, ticks, and other biting bugs.
Cayenne, Garlic, and Onion Powder
Walk around your home and sprinkle all cockroach-prone areas with this spice mixture. Cockroaches can't stand the smell of these spices and will avoid all areas sprinkled with them.
Not only is peppermint oil a natural cockroach repellent—it's also toxic to roaches (and for the record, to bed bugs, too).
The Center for Disease Control and Prevention recommends lemon eucalyptus oil as an active ingredient in insect repellents. Lemon eucalyptus (Eucalyptus citriodora or Corymbia citriodora) is a type of eucalyptus tree. It has naturally high amounts of the compound citronellal, which repels bugs.
Make a repellent spray by adding 1/4 teaspoon of eucalyptus oil to one cup of water in a spray bottle, advises Pest Guidance. Shake well to mix, and apply to plants or other areas of the garden where insects have been seen. The oil will separate from water, so shake before each application.
Eucalyptus is preserved using glycerin, so there are no harsh chemicals and only the natural eucalyptus oil scents it. It won't retain the full scent forever, but usually is quite fragrant for several weeks up to a few months, and then is less scented as it sits.
In the wild, these include: Amphibians like toads and frogs. Small mammals such as mice and shrews. Beetles, spiders, and other insects or arachnids.
The smell of lemons repels cockroaches to a great extent, keeping them away from areas that reek of the fruit. Hence, it is advisable to mop floors with water that has a few lemon drops in it.
It's a fact that cockroaches are afraid of humans and other mammals or animals that are bigger than them. They see us as predators and that fear triggers their instinct to scatter away. However, they dislike strong and distinctive scents such as citrus, peppermint, lavender and vinegar.
This alerts cockroaches of danger, food, and the location of their colony. Because these organs detect vibration, cockroaches hate the sound of clapping, doors slamming, and stomping.
The most common places for a roach nest in the house are in kitchens or bathrooms, particularly behind refrigerators, in cracks and crevices, and under furniture. Roaches prefer a warm, humid environment, so these places should be considered first, especially if they are close to a food source and water supply.
Add some food like a small piece of meat or some sweet stuff like chocolate on the roach bait in the bowl. Keep the bowl near one of the hiding places of roaches. To cover all the hiding places, you'll need multiple bowls with sticky roach trap and food. The smell of the food will draw the roaches out.
The Centers for Disease Control and Prevention (CDC) recommends oil of lemon eucalyptus as an insect repellent. Oil of lemon eucalyptus contains PMD (para-menthane 3, 8 diol), its main bug-repelling factor.
Used since the 1940s, lemon eucalyptus oil is one of the more well-known natural repellents. The Centers for Disease Control and Prevention (CDC) have approved eucalyptus oil as an effective ingredient in mosquito repellent.